Solve the simultaneous equations
2x=13+yx+7y=8 \begin{aligned} 2x &= 13 + y \\ x + 7y &= 8 \end{aligned} 2xx+7y=13+y=8217 exam-style questions on OCR GCSE Maths Simultaneous Equations. Each one has a worked solution and a mark scheme showing where the marks go.